This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The ::-webkit-progress-inner-element CSS pseudo-element represents the outermost container of the <progress> element. It is the parent of the ::-webkit-progress-bar pseudo-element.

Note: In order to let ::-webkit-progress-value take effect, -webkit-appearance needs to be set to none on the <progress> element.



<progress value="10" max="50">


progress {
  -webkit-appearance: none;

::-webkit-progress-inner-element {
  border: 2px solid black;


A progress bar using the style above would look like this:


Not part of any specification. This is a proprietary pseudo-element specific to WebKit/Blink.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support Yes No No No Yes Yes
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support Yes Yes No No Yes Yes ?

See also

Document Tags and Contributors

Contributors to this page: teoli, ExE-Boss, mfluehr, Sebastianz, cvrebert
Last updated by: teoli,